Hammer mfg



H. J. HARRIES.

MOTOR commoutn. APPLICATION FILED OCT- |2L|9l4 '1 324, 1 94; Patented Dec. 9, 1919.

6 26 I I v 6 i .5 5 v r r o II llll- UNITED STATES PATENT orrron.

HERBERT J. HA RRIES, OF MILWAUKEE, WISCONSIN, ASSIGNOR TO THE CUTLER- HAMMER MFG. 00., OF MILWAUKEE, WISCONSIN, A CORPORATION OF WIS-' CON SIN.

. moron-communes,

Specification of Letters Iatent.

Patented Dec. 9, 1919.

' Application filed October 12, 1914. Serial No. 866,417.

110 all whom it may concern:

Be it known that I, HERBERT I a citizen of the United States, residm at M11- waukee, in the county of Milwau cc and State of Wisconsin, have invented new and useful Im rovements in Motor-Controllers,

regulate the running speed.

This invention has among its objects to provide means whereby the eflectlveness of such controllers may be curtailed to msure against unauthorized or careless operation of the vehicle by garage employees or others entrusted with the general care of the machine. U A further object is to provide means which may be locked independently of the master controller to render the latter ineffectual to establish high speed circuit connections.

Other objects and advantages will be 111 part obvious and in part pointed out hereafter in connection with a'description of a diagrammatlc representation of the mvention shown in the accompanying drawing, wherein,

The figure is a diagrammatic View of a control system for electric motor veh1cles.

Referring more specifically to the drawing, there is shown a driving motor M having series fields 1 and 2 and a source of 'current supply comprising batteries 3 and 4. A master controller C is provided to govern the circuit connections of the elements enu merated and is arranged to control the motro-responsive swltch 5, to effect either series or parallel connection of the batteries by'an electro-responsive switch 6, and also to efi'ect either series or parallel connection of the fields by a third electro-responsive swltch 7.

The controller C, ads-represented, comprises a pivoted arm 8 connected to one pole of the batteries and arranged to engage stationary contact segments 9, 10 and 11, whenoperated, for effecting operation of the switches 5, 6 and 7 respect1vely, as follows:

Movement of the arm 8 from off position to position b completes circuit from battery 3 by conductor 12 to contact 9, by conductor 13 through coil Winding 6 of switch 6 and by conductor 14 to the other pole of the battery. Switch '6 thereupon responds and establishes parallel connection for the batteries by conductors 15 and 16 as will be obvious. Momentarily thereafter the control arm 8 engages segment 10 and makes c1rcu1t .b conductor 17 to winding 5 (of switch 5; and by conductor 14 as traced.

The switch .5 then operates to close the motor c1rcu1t-from the batteries, now. in parallel, by conductor 18 through the fields l position 0 for engaging segment 11 and energizing windin 7""by conductors 20 and 14. Sw1tch 7 1s t ereupon moved to break the serles connections of the fields 1 and 2 and establish'the same in parallel by o0nduc-.

' drive of the vehicle is effected, and it is to be noted that under both of these conditions tlllle lbatteries 3 and 4 are connected in para e Two further steps in motor speed are obtainable' by the controller as follows:

Movement of the arm 8 to fourth position 03 maintains switch 5 closed, but breaks circuit to both windings 6 and 7 So that the respective switches drop and restore both the batteries and the fields to series. Finally operation of the controller to extreme position 03 again energizes winding 7 and thereby again connects the fields in parallel.

With a control system of which that described is typical, 1 I now provide means whereby the vehicle may be locked in a condition which renders the controller C inefable arm ,8. Moreover, said switch 23 is of a character to enable positive key locking when desired by a locking device 26. It

' will be apparent therefore that, with the switch 23 closed, movement of the control arm 8 to positions d and 'e vnow merely operates to connect the batteries in parallel and the fields in series ((1) or the batteries in parallel and the fields in parallel (e). The capabilities of the controller C. are thus curtailed and operation of the vehicle positively restricted to slow driving speeds.

Any extreme or unauthorized use of the vehicle is thus effectually prevented, and at the same time, necessary operation of the car for battery recharging and other care is, of course, permitted.

What I claim as new and desire to secure by Letters Patent is 1. In a motor controller, in combination, means controlling a plurality of circuits to afford a given range of speed control of the motor, and lockable means for modifying certain of such circuits to curtail the range of speed control afforded by saidfirst mentioned means. 2. In a motor "controller, in combination, a plurality of electro-responsive switches to effect operation of the motor at different speeds, a master controller for said switches A and lockable means to vary the circuit connectio'ns betweencertain of said switches and said controller to curtail the range of speed variation efi'ectible by said controller.

3. In a motor controller, in combination, a plurality of switches for varying the speed of the motor, control means therefor including a member movable to effect variation of the motor speed through a givenrange andv lockable means associated withsaid control means to curtail such range of speed control without curtailing the movements of said member.

4 Ina motorcontroller, in combination, a master controller,

electro responsive speed of said motor and for connecting said batteries in series for a higher range of speed of said motor and lockable means for rendering said first mentioned means inefiective to connect said batteries in series without curtailing operation. of said member.

- 6. In a motor controller, in combination,

a motor, supply batteries therefor, control "means including a movable member for effecting speed regulation of said motor by commutation of said batteries and by other circuit variations and lockable means to restrict said regulation by rendering said means incapable of eflecting battery commutation during operation of said motor without curtailing operation of'said member. a

7. In a motor vehicle controller, in combination, means including a movable member having a plurality of positions to effect speed regulation by a plurality of circuit variationspfand lockable means to curtail the number of circuit variations efi'ectible by said first mentioned means without curtailing the operation of said member.

8. In a motor controller, in combination, speed regulating meansfincluding an electro-responsiveswitch, adapted to' be energized for establishing one circuit and to be denergized for establishing another circuit, a master controller for efl'ecting energization 'and denergization of said switch, and lockable means to render said controller ineffective for 'denergizing said switch' during motor operation.' I

In witness whereof I have hereunto subscribed my name in the presence of two witnesses.

HERBERT I J. HARRIE S.

Witnesses: H. WATSON,

Tam Basil. 

